https://www.steadyhealth.com/medical-answers/brain-freeze-back-freeze-and-what-to-do-about-them
Something similar happens in a "back freeze." When cold food or drink reaches the bottom of your throat, it causes a contraction in your subclavian artery. On the right side of your throat, this artery extends just a little above your clavicle, your collarbone. Cold substances at the base of your throat can cause the subclavian artery to shrink near your spine with a similar effect. However, because there is less blood flow in your subclavian artery that there is in your carotid arteries, it takes longer to get over your "back freeze."
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Something similar happens in a "back freeze." When cold food or drink reaches the bottom of your throat, it causes a contraction in your subclavian artery. On the right side of your throat, this artery extends just a little above your clavicle, your collarbone. Cold substances at the base of your throat can cause the subclavian artery to shrink near your spine with a similar effect. However, because there is less blood flow in your subclavian artery that there is in your carotid arteries, it takes longer to get over your "back freeze."
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Something similar happens in a "back freeze." When cold food or drink reaches the bottom of your throat, it causes a contraction in your subclavian artery. On the right side of your throat, this artery extends just a little above your clavicle, your collarbone. Cold substances at the base of your throat can cause the subclavian artery to shrink near your spine with a similar effect. However, because there is less blood flow in your subclavian artery that there is in your carotid arteries, it takes longer to get over your "back freeze."
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